—I’m sorry to have kept you ______ for such a long time.—It doesn’t matter.A. wait B. waiting C. to wait
Do you see Mr. Brown go ____?
–Is there ____ milk in the glass? ---Yes, there is ____.
---Do you often _____ your sister? ---Yes, she often writes to me.
---Whose pens are there? --They are ____. They aren’t ____.
Is this your coat _____ his coat?